#pragma once

#include <iostream>
#include <string>
#include <cstring>
#include <cstdio>
#include <set>
#include "Log.hpp"
#include "InetAddr.hpp"
using namespace hcc;

class command
{
    public:
    command()
    {
        _safe_command.insert("ls");
        _safe_command.insert("touch");
        _safe_command.insert("pwd");
        _safe_command.insert("whoami");
        _safe_command.insert("which");

    }
    ~command(){}

    bool SafeCheck(const std::string &cmdstr)
    {
        for(auto &cmd:_safe_command)
        {
            if(strncmp(cmd.c_str(),cmdstr.c_str(),cmd.size())==0)
            {
                return true;
            }
        }
        return false;
    }
    std::string Excute(const std::string &cmdstr)
    {
        if(!SafeCheck(cmdstr))
        {
            return "unsage";
        }
        std::string result;
        FILE*fp=popen(cmdstr.c_str(),"r");
        if(fp)
        {
            char line[1024];
            while(fgets(line,sizeof(line),fp))
            {
                result+=line;
            }
            return result.empty()?"success":result;
        }
        return "excute error";
    }
    void HandlerCommand(int sockfd,InetAddr addr)
    {
        std::cout<<111<<std::endl;
        while(true)
        {
            char commandbuf[1024];
            ssize_t n=::recv(sockfd,commandbuf,sizeof(commandbuf)-1,0);
            if(n>0)
            {
                commandbuf[n]=0;
                LOG(INFO,"get command from client %s ,command : %s\n",addr.AddrStr().c_str(),commandbuf);
                std::string result=Excute(commandbuf);
                ::send(sockfd,result.c_str(),result.size(),0);
            }
            else if(n==0)
            {
                LOG(INFO,"client %s quit \n",addr.AddrStr().c_str());
                break;
            }
            else 
            {
                LOG(ERROR,"read error : %s \n",addr.AddrStr().c_str());
                break;
            }
        }
    }

    private:
    std::set<std::string> _safe_command;
};

